2 years ago

A piece of wood is designed in the same of a cone.

Mathematics

1 answer:

77julia77 [94]2 years ago

6 0

Answer:

See explanation

Step-by-step explanation:

Volume of cone - volume of cylinder

[1/3π(6)²(14)] - [π(4)²(3)]

168π - 48π = 120π

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The sum of two numbers is -7. Five times the first number plus the second number is 1. What are the numbers?

arlik [135]

Answer:

Step-by-step explanation:

Well you only want the two equations so here they are.

x + y = -7

5*x + y = 1

I should give you the answer.

x = 2

y = -9 I think. These answers were done in my head.

4 0

2 years ago

NEED ALL 4! With the solution and step by step on what to do !! worth 35 points

creativ13 [48]

Answer:

I got you, give me a few minutes

1st one: 6x+12+6y

2nd one: -12a-20b

4th one: 2x times 18

Step-by-step explanation:

7 0

2 years ago

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Plz help im an idiot

MrMuchimi

Answer:

3.)138

4.) 149

Step-by-step explanation:

you add the two inside measures together.

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2 years ago

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Evaluate the expression 3xy - 2x^2 for x=4 and for y = 3<br><br> helpp

hram777 [196]

3*4*3-2*4^2 = 36-32 = 4

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2 years ago

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What is the maximum height of of Anna's golf ball? The equation is y=x−0.04x2.

elena-s [515]

Given:

The height of a golf ball is represented by the equation:

$y=x-0.04x^2$

To find:

The maximum height of of Anna's golf ball.

Solution:

We have,

$y=x-0.04x^2$

Differentiate with respect to x.

$y'=1-0.04(2x)$

$y'=1-0.08x$

For critical values, $y'=0$ .

$1-0.08x=0$

$-0.08x=-1$

$x=\dfrac{-1}{-0.08}$

$x=12.5$

Differentiate y' with respect to x.

$y''=(0)-0.08(1)$

$y''=-0.08$

Since double derivative is negative, the function is maximum at $x=12.5$ .

Substitute $x=12.5$ in the given equation to get the maximum height.

$y=(12.5)-0.04(12.5)^2$

$y=12.5-0.04(156.25)$

$y=12.5-6.25$

$y=6.25$

Therefore, the maximum height of of Anna's golf ball is 6.25 units.

7 0

2 years ago